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A note on factors affecting lamb survival in Indian sheep

Published online by Cambridge University Press:  02 September 2010

R. C. Malik  and
R. M. Acharya
R. C. Malik
Affiliation:
Department of Animal Breeding, Haryana Agricultural University, Hissar (Haryana), India
R. M. Acharya
Affiliation:
Department of Animal Breeding, Haryana Agricultural University, Hissar (Haryana), India
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Summary

Records on lamb survival were available for 757 lambs, the progeny of 33 rams. Purebred lambs were of the Nali and Lohi breeds and crossbred lambs were produced by mating Nali ewes to Nellore or Mandya rams, and Lohi ewes to Nellore rams. For the flock as a whole 93% of those born survived to 14 days of age and 86% to weaning. A least-squares analysis of variance showed that among the factors investigated only lamb's weight at birth significantly affected survival to 14 days of age, and lamb's weight at birth, ewe's weight at lambing and the year of birth had significant effects on lamb survival from 15 days to weaning. Heritability estimates for lamb survival were based on half sib correlations. For the period from birth to 14 days of age the estimates were 0·08 for pure Nali lambs and 0·03 for the whole flock, and for the period from 15 days to weaning the estimates were 0·10 and 0·26 for the two groups respectively.

Type
Research Article
Information
Animal Production , Volume 14 , Issue 1 , February 1972 , pp. 123 - 125
Copyright
Copyright © British Society of Animal Science 1972

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References

REFERENCES

Acharya, R. M. and Bawa, S. J. S. 1971. Milk production of ewes and its relationship with preweaning growth of lamb. Indian J. Anim. Sci. 41: 572–576.Google Scholar
Bhasin, N. R. 1968. Some factors affecting lamb losses up to first shearing in a flock of Chokla sheep. Indian J. vet. Sci. 38: 364–367.Google Scholar
Harvey, W. R. 1960. Least-squares analysis of data with unequal sub-class numbers. United States Department of Agriculture, ARS-20-8.Google Scholar
Karam, H. A. 1959. Some factors affecting lamb mortality in Rahmani sheep. Emp. J. exp. Agric. 27: 133–137.Google Scholar
Kramer, C. Y. 1957. Extension of multiple range test to group correlated adjusted means. Biometrics 13: 13–18.CrossRefGoogle Scholar
Lush, J. L., Lamoreux, W. F. and Hazel, L. N. 1948. The heritability of resistance to death in fowl. Poult. Sci. 27: 375–388.CrossRefGoogle Scholar
Malik, R. C. and Acharya, R. M. 1971. Breed differences in preweaning and post, weaning body weights. Indian J. Anim. Sci. (in press).Google Scholar
McMeniman, N. P. and Young, R. B. 1968. Lamb losses in late pregnancy and early life. Qd agric. J. 94: 589–595.Google Scholar
Purser, A. F. and Young, G. B. 1959. Lamb survival in two hill flocks. Anim. Prod. 1: 85–91.Google Scholar
Ragab, M. T., Asker, A. A. and Kadi, M. R. 1954. Some factors affecting mortality in Ossimi and Rahmani lambs. Indian J. vet. Sci. 24: 89–92.Google Scholar
Venkatachalam, G., Nelson, R. H., Thorp, F. Jr., Luecke, R. W. and Gray, M. L. 1949. Causes and certain factors affecting lamb mortality. J. Anim. Sci. 8: 392–397.CrossRefGoogle Scholar